Well, maybe it's not all bad. Thinking about it, maybe this could be the Legacy upgrade platform in the future. No encoder to set up and it wouldn't be much different from a current ERR TMCC cruise upgrade.
I am still a little mystified as to why the low end speeds seem to suffer, especially on these particular models. The original TMCC 0-8-0s had a very nice gear ratio and at the time were the slowest crawling TMCC/Odyssey steamers even with the old pre-on/off 32 step Odyssey. On my upgrade projects over the years, ERR cruise works especially well with low gear ratios. It's probably just the arrangement of speed destinations like Jon mentioned. Maybe Lionel service could update the firmware now that they are aware of customer complaints.